>Lightweight Vent Armor composite protection. Asymmetrical shin cap shell. Multi layered knee cap lined with vent armor foam. Adjustable calf wing with vent foam, pre-curved knee donut. segmented adjustable thigh guard and a removable liner with venting. Extended knee wing dome technology. Vapor free flex system incorporating free flex thigh guard protection and a free flex liner. anchor wrap strap across calf and knee for secure fit. Wrap strap lower leg closure, vent armor foam thermo core+liner.